摘要:
The invention relates to cyclic hexapeptides of the general formula III ##STR1## in which X represents the radical of an L-aminoacid of the general formula IIIa ##STR2## in which A and B are identical or different and denote alkyl having 1 to 3 carbon atoms, or A and B together represent a saturated, unsaturated or aromatic monocyclic or bicyclic structure having 3 to 6 carbon atoms, n denotes 0 or 1, and Y represents an aliphatic or aromatic L-aminoacid the side chain of which can be hydroxylated, and their salts with physiologically tolerated acids, and to a process for their preparation and their use and their intermediates.
摘要:
The invention relates to a process for the preparation of protected arginine-containing peptides by fragment coupling, at least one arginine-containing fragment being reacted as perchlorate, and to protected secretin derivatives of the formula I described.
摘要:
What is disclosed is a method for the manufacture of LH-RH and LH-RH analogs, which comprises reacting Glu-His(DnP)-OH with the corresponding peptide having a free amino group and protected carboxy groups in a solvent as used in peptide chemistry and with the addition of 3-hydroxy-4-oxo-3,4-dihydro-1,2,3-benzotriazine (HOObt) and a carbodiimide and then splitting off the Dnp-(2,4-dinitrophenyl) group. The new method greatly reduces the degree of histidine racemization. The invention also provides a new dipeptide, i.e. Glu-His(Dnp)-OH.
摘要:
A process for the purification of secretin by chromatography on an alkylated dextran gel is disclosed, as is a method of its manufacture appropriate for preparing larger amounts of secretin.
摘要:
The invention relates to a method of treating cardiac insufficiency by using compounds of the formula I ##STR1## in which n is 1 or 2, R, R.sup.1, R.sup.2 and R.sup.3 are identical or different and each denote hydrogen or an organic radical and R.sup.4 and R.sup.5, together with the atoms carrying them, form a mono-, bi- or tri-cyclic heterocyclic ring system. The invention furthermore relates to compounds of the formula I and agents containing these for use in the treatment of the abovementioned disease.
摘要:
The invention relates to a method of treating cardiac insufficiency by using compounds of the formula I ##STR1## in which n is 1 or 2, R, R.sup.1, R.sup.2 and R.sup.3 are identical or different and each denote hydrogen or an organic radical and R.sup.4 R.sup.5, together with the atoms carrying them, form a mono-, bi- or tri-cyclic heterocyclic ring system. The invention furthermore relates to compounds of the formula I and agents containing these for use in the treatment of the abovementioned disease.
摘要:
What are disclosed are aminoacid compounds of the formula ##STR1## wherein n is 0 or 1, and salts thereof, said compounds and salts having hypotensive properties; methods for making the compounds; pharmaceutical compositions containing the compounds or salts; and use of the compounds and salts for treating hypertension.
摘要:
The invention relates to a process for the preparation of compounds of the formula I ##STR1## in which n is 1 or 2, R denotes hydrogen or an organic radical, R.sup.1 denotes an organic radical, R.sup.2 and R.sup.3 are identical or different and denote hydrogen or an organic radical, and R.sup.4 and R.sup.5, together with the atoms bearing them, form a monocyclic, bicyclic or tricyclic heterocyclic ring system having 5 to 15 carbon atoms, which process comprises reacting compounds of the formula II defined in the description with compounds of the formula IV defined in the description, in the presence of phosphinic anhydrides of the formula III, where appropriate eliminating radicals which have been introduced to protect other functional groups and, where appropriate, esterifying free carboxyl groups in a manner known per se.
摘要:
The invention relates to peptide derivatives of the formula ##STR1## in which ##STR2## represents an acyl radical, B represents the radical of a dipeptide composed of a N.sup..omega. -acylated basic .alpha.-amino acid and another .alpha.-amino acid, and W represents hydroxyl or optionally substituted amino, to a process for their preparation, to agents containing them, and to their use.
摘要:
A method for separating insulin or certain insulin derivatives from mixtures containing the same by chromatography of the mixture on a column filled with silica gel having a particle size between 40 and 500 microns with an eluant mixture comprising chloroform, methanol, water and triethylamine.